Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o ano em que a equipe de Gary com o mascote do Tornado se juntou?
 ###Tabelas: CREATE TABLE singles_4–7 (singles_4–7_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE regional_championship (regional_championship_id AUTO_INCREMENT PRIMARY KEY, Year INT, Delaware VARCHAR, Maryland VARCHAR, New Jersey VARCHAR, New York VARCHAR, Pennsylvania VARCHAR, Washington, D.C. VARCHAR) CREATE TABLE affiliate_members (affiliate_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Current Conference VARCHAR, Pac-12 Sports VARCHAR) CREATE TABLE former_members (former_members_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, City VARCHAR, Mascot VARCHAR, County VARCHAR, Year joined INT, Previous Conference VARCHAR, Year Left INT, Conference Joined VARCHAR) CREATE TABLE electoral_districts (electoral_districts_id AUTO_INCREMENT PRIMARY KEY, District INT, Region VARCHAR, Communes VARCHAR, Population (2002 census) INT, % of total population VARCHAR, VAP INT, Enrolled INT, Total votes INT, Valid votes INT, Turnout VARCHAR, E/VAP VARCHAR, T/VAP VARCHAR, V/VAP VARCHAR)  
SELECT MIN Year joined FROM former_members WHERE City = gary AND Mascot = tornado